the day temperature increase from a minimum of 2°c to a maximum of 20°c. But it decreases gradually, until it reaches zero degrees at 22h00.With how many degrees during the night, what will the minimum temperature be then?​

t = 3

step-by-step explanation:

put t = 3 in this expression :

(3²-1)(3²-2)(3² - 3)(3² - 4) = 8×7×6×5 = 56×30 = 1680

1/4 because there is 4 grades.

1 1/5

step-by-step explanation:

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,